root/OpenSceneGraph/trunk/include/osgUtil/SmoothingVisitor @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSGUTIL_SMOOTHINGVISITOR
15#define OSGUTIL_SMOOTHINGVISITOR 1
16
17#include <osg/NodeVisitor>
18#include <osg/Geode>
19#include <osg/Geometry>
20
21#include <osgUtil/Export>
22
23namespace osgUtil {
24
25/** A smoothing visitor for calculating smoothed normals for
26  * osg::GeoSet's which contains surface primitives.
27  */
28class OSGUTIL_EXPORT SmoothingVisitor : public osg::NodeVisitor
29{
30    public:
31
32        /// default to traversing all children.
33        SmoothingVisitor();
34        virtual ~SmoothingVisitor();
35
36        /// smooth geoset by creating per vertex normals.
37        static void smooth(osg::Geometry& geoset, double creaseAngle=osg::PI);
38
39        /// apply smoothing method to all geode geosets.
40        virtual void apply(osg::Geode& geode);
41
42        /// set the maximum angle, in radians, at which angle between adjacent triangles that normals are smoothed
43        /// for edges that greater the shared vertices are duplicated
44        void setCreaseAngle(double angle) { _creaseAngle = angle; }
45        double getCreaseAngle() const { return _creaseAngle; }
46
47    protected:
48
49        double _creaseAngle;
50
51};
52
53}
54
55#endif
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